Web Services Tutorial phần 3 pptx

22 Currently Supported Protocols • SOAP 1.1 • Released SOAP 1.2 spec • WSDL 1.1 • WSDL 1.2 spec work in progress • UDDI v1 • Released UDDI v2 and v3 spec’s 23 VW Web Services Toolkit • Provides support in – creating XML to object binding from a schema – marshaling/unmarshaling XML types in to Smalltalk object and visa versa – creating classes from XML to object binding – building and deploying Web services from an existing application – creating classes from a WSDL schema and accessing Web services – searching and publishing Web services in UDDI registry Web Services Invocation 25 Loading WSDL Schema • WsdlBinding – loads and register a WSDL schema – creates Wsdl configuration – serves as a repository of WSDL schemas WsdlBinding loadWsdlBindingFrom: self wsdlSpecification readStream 26 How to access Web Services • WsdlClient – quick and easy way to invoke a service – doesn’t create any classes • WsdlClassBuilder – create client classes to invoke a service – can create Opentalk server and client and service classes • WsdlWizard – GUI tool available in vw 73 27 WsdlClient • Loads and parses a Wsdl schema • Creates default binding to dictionaries • Invokes a Web services client := WsdlClient url: ‘http://www.xmethods.net/sd/2001/CurrencyExchangeService.wsdl'. rate := client executeSelector: #getRate args: (Array with: 'usa' with: ‘canada') 28 WsdlClassBuilder • Loads and parses a Wsdl schema • Creates XML to object binding and classes from it • Creates client, server and service classes builder := WsdlClassBuilder readFrom: 'http://www.xmethods.net/sd/2001/CurrencyExchangeService.wsdl' asURI. builder package: 'CurrencyExchange'. 29 Creating WSDL Client Class clientClass := builder createClientClasses first. - derived from WsdlClient - created for each WSDL port Smalltalk defineClass: #CurrencyExchangePortClient superclass: #{WebServices.WsdlClient} #getRateCountry1: aString country2: aString1 #initialize super initialize. self setPortNamed: 'CurrencyExchangePort'. #class wsdlSchema "(WebServices.WsdlBinding loadWsdlBindingFrom: self wsdlSchema readStream.)" … WSDL schema with XML to object binding Port is registered in WsdlPort.PortRegistry 30 Testing WSDL Client client := clientClass new. client createScript inspect. rate := client getRateCountry1: ‘usa’ country2: ‘canada’ 31 Creating Service Class Stub serviceClass := builder createServiceClasses first. Smalltalk defineClass: #CurrencyExchangeBinding superclass: #{Core.Object} getRateCountry1: aString country2: aString1 <operationName: #getRate > <addParameter: #country1 type: #String > <addParameter: #country2 type: #String > <result: #Float > ^self "Add implementation here" [...]... #getRateCountry1: aString country2: aString1 ^proxy getRateCountry1: aString country2: aString1 #serverUrl ^'http:/ /services. xmethods.net:80/soap‘ Request Broker WSDL schema with XML to Object Binding #class wsdlSchema "(WebServices.WsdlBinding loadWsdlBindingFrom: self wsdlSchema readStream.)" 32 . deploying Web services from an existing application – creating classes from a WSDL schema and accessing Web services – searching and publishing Web services in UDDI registry Web Services Invocation 25 Loading. 1.2 spec • WSDL 1.1 • WSDL 1.2 spec work in progress • UDDI v1 • Released UDDI v2 and v3 spec’s 23 VW Web Services Toolkit • Provides support in – creating XML to object binding from a schema –. #CurrencyExchangePortClient superclass: #{WebServices.WsdlClient} #getRateCountry1: aString country2: aString1 #initialize super initialize. self setPortNamed: 'CurrencyExchangePort'. #class wsdlSchema "(WebServices.WsdlBinding